AsyncTask onPostExecute不可靠

Question

我有一个异步任务，它有一个非常简单的doInbackground和onPostExecute。 由于某些原因，我看到PostExecute方法被调用，并且在极少数情况下，它被调用被跳过。这导致我的应用程序出现意外流量。鉴于它大部分时间被调用，我知道语法和参数是正确的。我也不会随时“取消”我的asynctask。那么，为什么会被跳过？

private class ViewStoppedAsync extends AsyncTask<Void, Void, Void> {

    public ViewStoppedAsync() {

    }

    @Override
    protected Void doInBackground(Void... params) {
        Log.d(TAG, "ViewStopped - doInBackground");
        releaseMediaPlayer();
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        Log.d(TAG, "ViewStopped - onPostExecute");
        super.onPostExecute(result);
        <<my code>>
    }

            private void releaseMediaPlayer() {
    Log.v(TAG, "releaseMediaPlayer()");
    try {
        videoView.stopPlayback();
    } catch (Exception e) {
        Log.i(TAG, "Handled: releaseMediaPlayer videoView.stopPlayback() - " + e, e);
    }
    if (mp != null) {
        try {
            mp.stop();
        } catch (IllegalStateException e) {
            Log.i(TAG, "Handled: releaseMediaPlayer mp.stop() - " + e, e);
        } finally {
            mp.release();
            mp = null;
        }
    }
}
}